Probe check valve



FIG. 1 is a side perspective view of a probe check valve, showing my new design;

FIG. 2 is a front end view of the probe check valve;

FIG. 3 is a back end view of the probe check valve; and,

FIG. 4 is a side elevational view of a probe check valve, all other sides being a mirror image thereof. 

The ornamental design for a probe check valve, as shown and described. 